Return-Path: Received: from rly-dc06.mx.aol.com (rly-dc06.mail.aol.com [172.19.136.35]) by air-dc02.mail.aol.com (v126.13) with ESMTP id MAILINDC022-b284b197bb8230; Fri, 04 Dec 2009 16:15:02 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dc06.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDC064-b284b197bb8230; Fri, 04 Dec 2009 16:14:33 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NGfT8-0002LW-FJ for rs_out_1@blacksheep.org; Fri, 04 Dec 2009 21:13:38 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NGfT7-0002LN-Vg for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2009 21:13:37 +0000 Received: from out1.ip06ir2.opaltelecom.net ([62.24.128.242]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NGfT7-0007VI-0T for rsgb_lf_group@blacksheep.org; Fri, 04 Dec 2009 21:13:37 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AngFAO8JGUtOlOfC/2dsb2JhbACCJirUHoQzBA X-IronPort-AV: E=Sophos;i="4.47,344,1257120000"; d="scan'208,217";a="290382234" Received: from unknown (HELO TraceyPC) ([78.148.231.194]) by out1.ip06ir2.opaltelecom.net with SMTP; 04 Dec 2009 21:13:15 +0000 Message-ID: From: "Tracey Gardner" To: References: <38A51B74B884D74083D7950AD0DD85E828AB4A@File-Server-HST.hst.e-technik.tu-darmstadt.de> In-Reply-To: <38A51B74B884D74083D7950AD0DD85E828AB4A@File-Server-HST.hst.e-technik.tu-darmstadt.de> Date: Fri, 4 Dec 2009 21:13:14 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18005 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18005 X-Karma: unknown: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Re: Active Antenna Preamp of Bernd/DF8ZR Content-Type: multipart/alternative; boundary="----=_NextPart_000_0129_01CA7526.9796A600" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_60_70, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE,MISSING_OUTLOOK_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0129_01CA7526.9796A600 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable The URL is an invalid one Tracey ----- Original Message -----=20 From: Stefan Sch=E4fer=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Friday, December 04, 2009 5:51 PM Subject: LF: Active Antenna Preamp of Bernd/DF8ZR Hi Lowfers,=20 Now, Bernd has posted the circuit of his preamp for active antennas:= http://www.mydarc.de/df8zr/lf-active-antenna.pdf=20 It's nothing fundamental new. But it's just working very fine, with= an overvoltage shielded input. DLF (153kHz) gets attenuated by abt 40= dB, compared to the sigs in the wanted frequency range. Gain is abt 23= dB. It was published in summer 2003 in the CQDL.=20 73, Stefan ------=_NextPart_000_0129_01CA7526.9796A600 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
The URL is an invalid one
 
Tracey
----- Original Message -----
Sent: Friday, December 04, 20= 09 5:51=20 PM
Subject: LF: Active Antenna= Preamp of=20 Bernd/DF8ZR

Hi Lo= wfers,=20

 

Now,=20 Bernd has posted the circuit of his preamp for active antennas:=20 http://www.mydarc.de/df8zr/lf-active-antenna.pdf<= /A>=20

 

It=92s=20 nothing fundamental new. But it=92s just working very fine, with an= overvoltage=20 shielded input. DLF (153kHz) gets attenuated by abt 40dB, compared= to the sigs=20 in the wanted frequency range. Gain is abt 23dB. It was published in= summer=20 2003 in the CQDL=85

 

73,=20 Stefan

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